Ah ha! Ok, the Makefile itself is directing make to that non-existent
directory.
Makefile attached, and here is the relevant section:
# File: arcmsr/Makefile
# Makefile for the Areca ARC-11XX/12XX/16XX SAS/SATA RAID Controller
# Copyright (C) 2009 - 2012 Areca Technology Corporation
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, version 2
# of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
#
# Main targets:
# all (the default) : make all
# clean : clean files
# install : make all + install
# uninstall : uninstall
#
# Notes :
# - install and uninstall must be made as root
ifeq ($(KVER),)
ifeq ($(KDIR),)
KVER = $(shell uname -r)
KDIR := /lib/modules/$(KVER)/build
endif
else
KDIR := /lib/modules/$(KVER)/build
endif
